Plasma arc welding apparatus for stainless steel cookware with slag removal

Abstract

This invention relates to the field of welding equipment technology, specifically to a plasma arc welding equipment for stainless steel cookware with slag removal function. It includes a plasma arc welding machine body and a robotic arm mounted thereon, as well as a slag removal mechanism mounted on the mounting base and located behind the welding mechanism in the direction of travel. The slag removal mechanism includes a slag removal scraper that can float up and down relative to the mounting base and an air extraction device, which generates negative pressure at the slag removal scraper. By integrating the welding mechanism, slag removal mechanism, and cooling mechanism onto the same mounting base, and utilizing the relative displacement of the floating slag removal scraper when in contact with the workpiece, automatic control of the three actions—welding, slag removal, and cooling—is triggered, achieving integrated continuous operation of welding, immediate slag removal, and rapid cooling. Immediately after slag removal, spray cooling is applied to the weld seam, which can rapidly reduce the weld temperature and effectively inhibit high-temperature oxidation and discoloration.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a plasma arc welding device for stainless steel cookware with slag removal function. Background Technology

[0002] In the production of stainless steel cookware, the bottom and body of the pot often need to be welded together. Plasma arc welding is widely used for joining such thin-plate components due to its concentrated energy, small heat-affected zone, and high weld quality.

[0003] Currently, plasma arc welding equipment used for stainless steel cookware typically only has a single welding function. After welding, a layer of slag composed of oxides and spatter forms on the weld surface. To obtain a clean finished product, a separate slag removal process must be added after welding, such as scraping it manually or with special tools. This separate process of welding first and then removing slag not only increases production steps and labor costs, but also makes the slag difficult to remove because it hardens after the weld has completely cooled, easily damaging the surface of the cookware substrate and affecting the product's appearance and quality. In addition, the high temperature generated during welding can easily cause oxidation and discoloration in the weld area, affecting its appearance and usually requiring subsequent pickling or polishing. Summary of the Invention

[0004] The main objective of this invention is to provide a plasma arc welding device for stainless steel cookware with slag removal function, so as to solve the problems raised in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a plasma arc welding device for stainless steel cookware with slag removal function is provided, comprising a plasma arc welding machine body and a robotic arm mounted thereon, and further comprising:

[0006] A mounting base is provided at the end of the robotic arm;

[0007] A welding mechanism, mounted on the mounting base, is used to perform welding work;

[0008] A cleaning mechanism, mounted on the mounting base and located behind the welding mechanism in the direction of travel, is used to remove welding slag; the cleaning mechanism includes a cleaning scraper that can float up and down relative to the mounting base and an air extraction device, the air extraction device being used to generate negative pressure at the cleaning scraper;

[0009] A cooling mechanism, mounted on the mounting base and located on the side of the cleaning mechanism away from the welding mechanism, is used to cool the weld.

[0010] A triggering mechanism is disposed between the mounting base and the cleaning scraper. When the cleaning scraper is pressed and moves upward relative to the mounting base, the triggering mechanism activates the welding mechanism, the air extraction device, and the cooling mechanism.

[0011] Furthermore, the cleaning scraper is an L-shaped folded plate with an arc-shaped junction between its two straight edges; a slag collection groove is provided on the side of the cleaning scraper facing the welding mechanism, and at least one air intake is provided on the top of the slag collection groove, which is connected to the air extraction device through an air intake pipe.

[0012] Furthermore, a slag storage groove is fixedly provided on the cleaning scraper. The slag storage groove is located at the bottom of the vertical edge of the cleaning scraper and is arranged towards the side of the pot.

[0013] Furthermore, the slag collection tank is provided with several ribs, which divide the slag collection tank into multiple independent tanks, and each independent tank is provided with an air intake at its top.

[0014] Furthermore, the triggering mechanism includes:

[0015] An air extraction trigger is disposed between the mounting base and the cleaning scraper. When the cleaning scraper moves upward relative to the mounting base, the air extraction trigger activates the starting circuit of the air extraction device.

[0016] A plasma arc welding torch trigger is disposed between the mounting base and the cleaning scraper. When the cleaning scraper moves upward relative to the mounting base, the plasma arc welding torch trigger activates the starting circuit of the welding mechanism.

[0017] A cooling trigger unit is disposed between the mounting base and the cleaning scraper. When the cleaning scraper moves upward relative to the mounting base, the cooling trigger unit activates the starting circuit of the cooling mechanism.

[0018] Furthermore, the air extraction trigger includes:

[0019] The upright is fixed to the bottom of the mounting base and has an air passage and a groove inside. The air passage is connected to the suction pipe.

[0020] A ball stopper is rotatably disposed within the trough, and the ball stopper has a ball stopper through hole for controlling the opening and closing of the air passage;

[0021] The push rod is fixedly connected to the support shaft of the ball blocker;

[0022] A guide rod is fixed to the cleaning scraper, and a push block is provided at its upper end. When the cleaning scraper moves upward relative to the mounting base, the push block pushes the push rod to rotate, so that the ball-blocking hole is connected to the air passage.

[0023] A vacuum trigger switch is connected in series in the starting circuit of the vacuum device and is located on the rotation path of the push rod. When the push rod rotates to a predetermined position, the vacuum trigger switch is triggered and turned on.

[0024] Furthermore, the plasma arc welding torch triggering part includes:

[0025] The welding torch control lever is fixed to the bottom of the mounting base;

[0026] The welding torch trigger block is fixed to the upright.

[0027] The welding torch trigger rod is fixed to the cleaning scraper and slides through the welding torch trigger support block;

[0028] A welding torch trigger spring is sleeved on the outside of the welding torch trigger rod, with its two ends abutting against the cleaning scraper and the welding torch trigger support block, respectively;

[0029] The welding torch trigger slider is slidably disposed in the welding torch trigger groove at the bottom end of the welding torch control rod. The top end of the welding torch trigger slider is fixedly provided with a lower welding torch trigger protrusion, and the top end of the welding torch trigger groove is fixedly provided with an upper welding torch trigger protrusion. The upper welding torch trigger protrusion and the lower welding torch trigger protrusion are connected in series in the starting circuit of the welding mechanism.

[0030] A welding torch trigger reset spring is disposed in the welding torch trigger groove to reset the welding torch trigger slider;

[0031] When the cleaning scraper moves upward relative to the mounting base, the welding torch trigger rod pushes the welding torch trigger slider upward, causing the lower welding torch trigger protrusion to contact the upper welding torch trigger protrusion.

[0032] Furthermore, the cooling trigger includes:

[0033] A cooling control rod is fixed to the bottom of the mounting base;

[0034] A cooling trigger block is fixed to the upright.

[0035] A cooling trigger rod is fixed to the cleaning scraper and slides through the cooling trigger support block;

[0036] A cooling trigger spring is sleeved on the outside of the cooling trigger rod, with its two ends abutting against the cleaning scraper and the cooling trigger support block, respectively;

[0037] A cooling trigger slider is slidably disposed in the cooling trigger groove at the bottom end of the cooling control rod. A cooling trigger lower protrusion is fixedly provided at the top end of the cooling trigger slider, and a cooling trigger upper protrusion is fixedly provided at the top end of the cooling trigger groove. The cooling trigger upper protrusion and the cooling trigger lower protrusion are connected in series in the starting circuit of the cooling mechanism.

[0038] A cooling trigger reset spring is disposed in the cooling trigger groove to reset the cooling trigger slider;

[0039] When the cleaning scraper moves upward relative to the mounting base, the cooling trigger rod pushes the cooling trigger slider upward, causing the lower cooling trigger protrusion to contact the upper cooling trigger protrusion.

[0040] Furthermore, the cooling mechanism includes:

[0041] The cooling plate is an L-shaped folded plate, with an arc-shaped junction between its two straight sides;

[0042] Multiple atomizing nozzles are fixedly installed on the side of the cooling plate facing the cookware;

[0043] Cooling water pipes are connected to each of the atomizing nozzles;

[0044] A cooling connecting rod is used to fix the cooling plate onto the mounting base.

[0045] Furthermore, the plasma arc welding machine body integrates the air extraction device and the sprayer, and the water outlet of the sprayer is connected to the cooling water pipe through a hose.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. By integrating the welding mechanism, slag removal mechanism, and cooling mechanism onto the same mounting base, and utilizing the relative displacement of the floating slag removal blade when in contact with the workpiece, the automatic control of the three actions—welding, slag removal, and cooling—is triggered, achieving a seamless integrated operation of welding, immediate slag removal, and rapid cooling. In particular, utilizing the residual heat of the weld to perform mechanical scraping and negative pressure adsorption before the weld slag has completely solidified reduces the difficulty of slag removal, avoids damage to the substrate caused by hard scraping after cooling, and improves the quality and efficiency of slag removal.

[0048] 2. By setting up a cooling mechanism, the weld is sprayed with cooling material immediately after slag removal, which can quickly reduce the weld temperature, effectively inhibit high-temperature oxidation and discoloration, reduce subsequent pickling and polishing processes, shorten the production process, and reduce manufacturing costs. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the overall invention;

[0050] Figure 2 This is a schematic diagram showing the positional relationship between the welding mechanism, the cleaning mechanism, and the cooling mechanism of the present invention;

[0051] Figure 3 This is a schematic diagram of the cleaning mechanism structure of the present invention;

[0052] Figure 4This is a cross-sectional view of the triggering mechanism of the present invention;

[0053] Figure 5 This is a partially enlarged schematic diagram of the present invention. Figure 1 ;

[0054] Figure 6 This is a partially enlarged schematic diagram of the present invention. Figure 2 ;

[0055] Figure 7 Cross-sectional view of the air extraction trigger part of the present invention Figure 1 ;

[0056] Figure 8 Cross-sectional view of the air extraction trigger part of the present invention Figure 2 ;

[0057] Figure 9 This is a cross-sectional view of the air extraction trigger switch of the present invention;

[0058] Figure 10 This is a schematic diagram of the cooling mechanism of the present invention.

[0059] Figure label:

[0060] 1. Plasma arc welding machine body; 2. Robotic arm; 3. Mounting base; 4. Plasma arc welding torch;

[0061] 5. Cleaning mechanism; 51. Cleaning scraper; 52. Slag collection trough; 53. Support ribs; 54. Air intake; 55. Slag storage trough;

[0062] 6. Cooling mechanism; 61. Cooling plate; 62. Atomizing nozzle; 63. Cooling water pipe; 64. Cooling connecting rod;

[0063] 7. Air extraction trigger; 70. Longitudinal groove; 71. Vertical rod; 72. Air passage; 73. Container groove; 74. Ball plug; 75. Guide rod; 76. Support shaft; 77. Push rod; 78. Ball plug through hole; 79. Push block;

[0064] 8. Plasma arc welding torch trigger part; 81. Welding torch control rod; 82. Welding torch trigger rod; 83. Welding torch trigger support block; 84. Welding torch trigger spring; 85. Welding torch trigger upper protrusion; 86. Welding torch trigger groove; 87. Welding torch trigger reset spring; 88. Welding torch trigger slider; 89. Welding torch trigger lower protrusion;

[0065] 9. Cooling mechanism trigger part; 91. Cooling control lever; 92. Cooling trigger lever; 93. Cooling trigger support block; 94. Cooling trigger spring; 95. Cooling trigger upper protrusion; 96. Cooling trigger groove; 97. Cooling trigger reset spring; 98. Cooling trigger slider; 99. Cooling trigger lower protrusion;

[0066] 10. Inhalation tube;

[0067] 11. Air extraction trigger switch; 111. Air extraction trigger block; 112. Air extraction trigger slider; 113. Air extraction trigger groove; 114. Air extraction trigger reset spring; 115. Air extraction trigger bottom protrusion; 116. Air extraction trigger top protrusion. Detailed Implementation

[0068] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0069] This embodiment provides a plasma arc welding device for stainless steel cookware with slag removal function, such as... Figure 1 As shown, the system includes a plasma arc welding machine body 1. A multi-degree-of-freedom robotic arm 2 is mounted on the plasma arc welding machine body 1, and a mounting base 3 is fixedly mounted at the end of the robotic arm 2. The robotic arm 2 can flexibly move the mounting base 3 to the predetermined welding position of the pot to be welded. During welding, the pot body without the bottom surface is inverted so that its opening faces downwards and its bottom faces upwards, and then the circular bottom piece to be welded is placed on the bottom of the pot body.

[0070] like Figure 2 As shown, the mounting base 3 is used to integrate and mount the welding mechanism, the cleaning mechanism 5, and the cooling mechanism 6. In this embodiment, the welding mechanism is specifically a plasma arc welding torch 4, which is fixedly mounted on the mounting base 3 for performing welding work.

[0071] The cleaning mechanism 5 is located behind the plasma arc welding torch 4 in the direction of travel. That is, when the mounting base 3 moves the various mechanisms along the welding direction, the cleaning mechanism 5 follows the plasma arc welding torch 4 and is used to remove the weld slag on the newly formed weld. The cooling mechanism 6 is located on the side of the cleaning mechanism 5 away from the plasma arc welding torch 4, that is, at the very back of the entire integrated unit, and is used to rapidly cool the weld after the weld slag has been removed.

[0072] like Figure 3 As shown, the cleaning mechanism 5 mainly includes a cleaning scraper 51. The cleaning scraper 51 is generally L-shaped, consisting of a vertical edge and a horizontal edge. To fit the arc-shaped transition area where the bottom of the stainless steel cookware intersects with the side wall, the junction of the two straight edges of the cleaning scraper 51 is designed to be arc-shaped. A slag collection groove 52 is provided on the side of the cleaning scraper 51 facing the plasma arc welding gun 4. To prevent the cleaning scraper 51 from deforming during operation and causing the slag collection groove 52 to be squeezed and closed, several support ribs 53 are fixedly installed inside the slag collection groove 52. These support ribs 53 divide the slag collection groove 52 into multiple independent, smaller grooves. An air intake 54 is provided at the top of each independent groove. All air intakes 54 are connected to the air intake pipe 10 via a flexible hose.

[0073] In addition, a slag collection trough 55 is fixedly provided at the bottom of the vertical edge of the scraper 51. The slag collection trough 55 is used to collect larger particles of welding slag that may fall from above or not be completely sucked up during the scraping process, preventing them from scattering in the work area.

[0074] In order to perform the function of cooling the weld, such as Figure 10 As shown, the cooling mechanism 6 includes a cooling plate 61. The cooling plate 61 is also L-shaped, with the intersection of its two right-angled sides designed as an arc to conform to the curvature of the bottom and sidewalls of the pot. Multiple atomizing nozzles 62 are fixedly mounted on the side of the cooling plate 61 closest to the pot. A cooling water pipe 63 and a cooling connecting rod 64 are located above the cooling plate 61. All atomizing nozzles 62 are connected to the cooling water pipe 63 via flexible hoses. The bottom end of the cooling connecting rod 64 is fixedly connected to the cooling plate 61, and the top end is fixedly connected to the mounting base 3, thereby suspending and fixing the entire cooling mechanism 6 to the mounting base 3. A sprayer is integrated into the plasma arc welding machine body 1. The outlet of this sprayer is connected to the cooling water pipe 63 via a flexible hose to provide cooling water to the atomizing nozzles 62.

[0075] The cleaning scraper 51 is equipped with a triggering mechanism, which automatically activates the welding, evacuation, and cooling functions when the cleaning scraper 51 contacts the surface of the cookware and generates relative displacement. The triggering mechanism includes an evacuation triggering part 7, a plasma arc welding torch triggering part 8, and a cooling triggering part 9, all of which are disposed between the mounting base 3 and the cleaning scraper 51.

[0076] like Figure 4 , Figure 7 , Figure 8 As shown. The suction trigger unit 7 includes a vertical rod 71. The top end of the vertical rod 71 is fixedly connected to the mounting base 3, so the vertical rod 71 can rise and fall together with the mounting base 3. An air passage 72 is vertically opened inside the vertical rod 71, and an enlarged cavity groove 73 is provided in the middle of the air passage 72. The bottom end of the air passage 72 is connected to the top end of the aforementioned suction pipe 10, thereby indirectly communicating with the suction port 54 on the cleaning scraper 51.

[0077] A ball stopper 74 is rotatably mounted within a trough 73. The ball stopper 74 has a through-hole 78 that passes through its body. Support shafts 76 are fixedly mounted on opposite sides of the ball stopper 74, and are rotatably connected to a vertical rod 71. A return torsion spring (not shown) is provided at the connection between the support shaft 76 and the vertical rod 71. Under normal conditions, the return torsion spring holds the ball stopper 74 in a position where the axis of the through-hole 78 is horizontal, and the through-hole 78 does not coincide with the vertical air passage 72, thus the air passage 72 is closed and blocked by the ball wall of the ball stopper 74. When the ball stopper 74 rotates 90 degrees around the support shaft 76 under external force, the through-hole 78 becomes vertical, aligning with the upper and lower sections of the air passage 72, thereby opening the air passage 72. A push rod 77 is fixedly connected to the same side of both support shafts 76. The push rod 77 is arranged parallel to the axis of the ball-blocking through hole 78. The side wall of the upright rod 71 is provided with a longitudinal groove 70 to accommodate and allow the push rod 77 to rotate freely within a certain angle range.

[0078] The suction trigger unit 7 also includes two guide rods 75. The bottom end of the guide rod 75 is fixedly connected to the top of the cleaning scraper 51, and its top end is inserted into a pre-set hole inside the upright rod 71 and slidably connected to the upright rod 71. A push block 79 is fixedly provided on the top end of the guide rod 75, facing the support shaft 76.

[0079] The suction trigger unit 7 also includes a suction trigger switch 11. This suction trigger switch 11 is fixedly installed inside the upright 71. Figure 9 As shown, the suction trigger switch 11 includes a suction trigger block 111, which has a horizontal suction trigger groove 113 inside. A suction trigger slider 112 is slidably disposed at the outer end of the suction trigger groove 113. A suction trigger top protrusion 116 is fixed to one end of the suction trigger slider 112 inserted into the suction trigger groove 113. A suction trigger bottom protrusion 115 is fixed to the bottom of the suction trigger groove 113 opposite to the suction trigger top protrusion 116. A suction trigger reset spring 114 is provided in the suction trigger groove 113. One end of the suction trigger reset spring 114 is fixedly connected to the bottom wall of the suction trigger groove 113, and the other end is fixedly connected to the suction trigger slider 112. When the suction trigger reset spring 114 naturally extends, it pushes the suction trigger slider 112 away from the bottom wall of the suction trigger groove 113, thereby separating the suction trigger top protrusion 116 from the suction trigger bottom protrusion 115. Both the bottom protrusion 115 and the top protrusion 116 of the air extraction trigger are conductors and are connected in series in the starting circuit of the air extraction device integrated on the plasma arc welding machine body 1. In this embodiment, the air extraction device is a vacuum pump. When the top protrusion 116 of the air extraction trigger contacts the bottom protrusion 115 of the air extraction trigger, the circuit is turned on and the vacuum pump starts; when the two are separated, the circuit is turned off and the vacuum pump stops.

[0080] The plasma arc welding torch triggering part 8 and the cooling triggering part 9 have similar structural principles and are used to control the start and stop of the plasma arc welding torch 4 and the sprayer, respectively.

[0081] like Figure 4 , Figure 5 As shown, the plasma arc welding torch triggering unit 8 includes a torch control rod 81, a torch triggering rod 82, and a torch triggering support block 83. The top end of the torch control rod 81 is fixedly connected to the mounting base 3. The torch triggering support block 83 is fixedly connected to the side wall of the upright rod 71. The bottom end of the torch triggering rod 82 is fixedly connected to the cleaning scraper 51, and its top end extends vertically upward through a through hole in the torch triggering support block 83 and slides with the through hole. A torch triggering spring 84 is sleeved on the outside of the torch triggering rod 82. The bottom end of the torch triggering spring 84 abuts against the cleaning scraper 51, and the top end abuts against the torch triggering support block 83. In its natural state, the torch triggering spring 84 tends to move the cleaning scraper 51 downward relative to the mounting base 3.

[0082] like Figure 5 As shown, the bottom end of the welding torch control lever 81 has a downward-facing welding torch trigger groove 86. A welding torch trigger slider 88 is slidably mounted on the bottom of the welding torch trigger groove 86. A welding torch trigger lower protrusion 89 is fixed to the top of the welding torch trigger slider 88. A welding torch trigger upper protrusion 85 is fixed to the top of the welding torch trigger groove 86 relative to the welding torch trigger lower protrusion 89. Both the welding torch trigger upper protrusion 85 and the welding torch trigger lower protrusion 89 are conductors and are connected in series in the starting circuit of the plasma arc welding torch 4. A welding torch trigger reset spring 87 is also provided in the welding torch trigger groove 86. The top end of the spring is fixed to the top wall of the welding torch trigger groove 86, and the bottom end is fixed to the welding torch trigger slider 88. In its natural state, the reset spring pushes the welding torch trigger slider 88 downward, causing the welding torch trigger lower protrusion 89 to separate from the welding torch trigger upper protrusion 85, thereby disconnecting the starting circuit of the plasma arc welding torch 4.

[0083] like Figure 4 and Figure 6 As shown, the cooling trigger unit 9 includes a cooling control rod 91, a cooling trigger rod 92, and a cooling trigger support block 93. The top end of the cooling control rod 91 is fixedly connected to the mounting base 3. The cooling trigger support block 93 is fixedly connected to the side wall of the upright 71. The bottom end of the cooling trigger rod 92 is fixedly connected to the cleaning scraper 51, and the top end slides through the cooling trigger support block 93. A cooling trigger spring 94 is sleeved on the outside of the cooling trigger rod 92, and its two ends abut against the cleaning scraper 51 and the cooling trigger support block 93, respectively.

[0084] like Figure 6As shown, the cooling control lever 91 has a downward-opening cooling trigger groove 96 at its bottom. A cooling trigger slider 98 slides within the cooling trigger groove 96. A lower cooling trigger protrusion 99 is fixedly mounted on the top of the cooling trigger slider 98. A higher cooling trigger protrusion 95 is fixedly mounted on the top of the cooling trigger groove 96 at a position corresponding to the lower cooling trigger protrusion 99. The upper cooling trigger protrusion 95 and the lower cooling trigger protrusion 99 are connected in series in the sprayer's starting circuit. A cooling trigger reset spring 97 is provided within the cooling trigger groove 96. The top of the cooling trigger reset spring 97 is fixedly connected to the top of the cooling trigger groove 96, and the bottom is fixedly connected to the top of the cooling trigger slider 98. When the cooling trigger reset spring 97 is not subjected to external force, it causes the cooling trigger slider 98 to move downward, causing the lower cooling trigger protrusion 99 to move away from the upper cooling trigger protrusion 95, thus keeping the circuit open.

[0085] The working process of the device of the present invention will be described in detail below to fully illustrate the cooperation relationship between its various components.

[0086] First, the operator inverts and fixes the pot to be welded, with its opening facing down and its bottom facing up. Then, a pre-made circular piece of the pot bottom is placed on the welding position on the pot body. The robotic arm 2 is operated to move the mounting base 3 and its attached plasma arc welding torch 4, cleaning mechanism 5, and cooling mechanism 6 above the welding start point. At this time, the posture is adjusted so that the vertical edge of the cleaning scraper 51 is against the side wall of the pot, while the horizontal edge of the cleaning scraper 51 is suspended above the bottom surface of the pot.

[0087] Next, the robotic arm 2 moves the mounting base 3 vertically downwards. As the mounting base 3 moves downwards, the horizontal edge of the cleaning scraper 51 first contacts the bottom surface of the pot. When the mounting base 3 continues to move downwards, since the cleaning scraper 51 is already pressed against the pot and cannot continue downwards, while the mounting base 3 is still moving downwards, the cleaning scraper 51 begins to have an upward relative displacement with respect to the mounting base 3, that is, the cleaning scraper 51 is "lifted up".

[0088] This relative motion triggers a series of chain reactions, namely, the activation of the triggering mechanism:

[0089] First, the triggering process of the plasma arc welding torch triggering part 8 and the cooling triggering part 9: As the mounting base 3 moves downward, the upright rod 71, the welding torch control rod 81, and the cooling control rod 91 fixed on it also move downward together. Since the cleaning scraper 51 is held up by the pot, the welding torch triggering rod 82 and the cooling triggering rod 92 fixed on it remain at a constant height. Therefore, the downward-moving welding torch triggering support block 83 and the cooling triggering support block 93 compress the welding torch triggering spring 84 and the cooling triggering spring 94, respectively. At the same time, the downward-moving welding torch control rod 81 and the cooling control rod 91 drive the welding torch triggering slider 88 and the cooling triggering slider 98 inside them to move downward together. When it moves down to a certain extent, the top end of the welding torch triggering rod 82 will contact the bottom end of the welding torch triggering slider 88 and push it upward. The upward movement of the welding torch triggering slider 88 compresses the welding torch triggering reset spring 87 and drives the welding torch triggering lower protrusion 89 to move upward until it contacts the welding torch triggering upper protrusion 85. At this time, the starting circuit of the plasma arc welding gun 4, which has the two protrusions connected in series, is turned on, and the plasma arc welding gun 4 starts working and can perform welding operations. At the same time, the cooling trigger rod 92 also pushes up the cooling trigger slider 98 in the same way, so that the lower cooling trigger protrusion 99 contacts the upper cooling trigger protrusion 95, turning on the start circuit of the sprayer, and the sprayer starts working.

[0090] Second, the triggering process of the suction trigger 7: As the mounting base 3 moves downward, the upright 71 also moves downward. Since the cleaning scraper 51 remains stationary, the guide rod 75 fixed to it is inserted upward relative to the upright 71. The push block 79 at the top of the guide rod 75 moves upward and enters the longitudinal groove 70 of the upright 71. The push block 79, which continues to move upward, contacts the push rod 77 and pushes the push rod 77 to rotate upward around the support shaft 76. The rotation of the push rod 77 causes the ball plug 74 to rotate synchronously. When the push rod 77 is pushed to the vertical position, the ball plug through hole 78 also becomes vertical and completely overlaps with the air passage 72, thereby opening the originally closed air passage 72. At the same time, the other end of the push rod 77, which has rotated to the vertical position, pushes the suction trigger slider 112 of the suction trigger switch 11 to retract into the suction trigger groove 113. The vacuum trigger slider 112 moves the vacuum trigger top protrusion 116 toward the vacuum trigger bottom protrusion 115, compressing the vacuum trigger reset spring 114. When the vacuum trigger top protrusion 116 contacts the vacuum trigger bottom protrusion 115, the vacuum pump's start-up circuit is activated, and the vacuum pump starts working.

[0091] At this point, once the mounting base 3 is pressed into place, the plasma arc welding torch 4, vacuum pump, and sprayer are simultaneously activated. The robotic arm 2 then moves the mounting base 3 horizontally along the welding trajectory. During this movement, the plasma arc welding torch 4 welds the joint between the pot bottom and the pot body, forming a weld. Following closely behind is the cleaning scraper 51, whose thin edge scrapes away the slag that has not yet fully cooled and solidified from the weld surface. Simultaneously, because the vacuum pump has been activated, a negative pressure is created at the suction port 54 of the slag collection tank 52. The scraped slag, along with the surrounding air, is sucked into the slag collection tank 52 and then drawn away through the suction pipe 10 and air passage 72. Larger or rolling slag pieces fall into the slag storage tank 55 at the bottom and are collected. Finally, the cooling mechanism 6 uses atomizing nozzles 62 to spray atomized cooling water onto the weld, which has just had its slag removed and is still at a high temperature, rapidly cooling the weld and thus inhibiting oxidation and discoloration.

[0092] When welding is completed, the robotic arm 2 moves the mounting base 3 upwards and away from the workpiece, and all the above actions are reversed. The cleaning scraper 51 is no longer under pressure, and under the restoring force of the welding torch trigger spring 84 and the cooling trigger spring 94, the cleaning scraper 51 moves downwards relative to the mounting base 3 to reset. The welding torch trigger rod 82 and the cooling trigger rod 92 no longer push up the corresponding sliders, and the welding torch trigger reset spring 87 and the cooling trigger reset spring 97 extend, causing the welding torch trigger lower protrusion 89 to move away from the welding torch trigger upper protrusion 85 and the cooling trigger lower protrusion 99 to move away from the cooling trigger upper protrusion 95. The corresponding circuits are disconnected, and the plasma arc welding torch 4 and the sprayer are turned off. Simultaneously, the guide rod 75 moves downward, the push block 79 moves away from the push rod 77, and under the action of the reset torsion spring, the plug ball 74 reverses and resets, the plug ball through hole 78 becomes horizontal, the air passage 72 is closed, and the push rod 77 no longer pushes the suction trigger slider 112. The suction trigger reset spring 114 extends, pushing the suction trigger slider 112 to the outside of the suction trigger groove 113. The suction trigger top protrusion 116 moves away from the suction trigger bottom protrusion 115, the vacuum pump starting circuit is disconnected, and the vacuum pump stops working. The air passage 72 is open when suction is being performed and closed when suction is not performed. This on-demand opening of the air passage 72 can effectively prevent external impurities from entering and clogging the air passage 72 when suction is not being performed.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A plasma arc welding device for stainless steel cookware with slag removal function, comprising a plasma arc welding machine body (1) and a robotic arm (2) mounted thereon, characterized in that, Also includes: Mounting base (3) is provided at the end of the robotic arm (2); A welding mechanism, mounted on the mounting base (3), is used to perform welding work; The cleaning mechanism (5) is installed on the mounting base (3) and located behind the welding mechanism in the direction of travel, and is used to remove welding slag; the cleaning mechanism (5) includes a cleaning scraper (51) that can float up and down relative to the mounting base (3) and an air extraction device, the air extraction device being used to generate negative pressure at the cleaning scraper (51); A cooling mechanism (6) is installed on the mounting base (3) and located on the side of the cleaning mechanism (5) away from the welding mechanism, for cooling the weld. A triggering mechanism is provided between the mounting base (3) and the cleaning scraper (51). When the cleaning scraper (51) is pressed and moves upward relative to the mounting base (3), the triggering mechanism activates the welding mechanism, the air extraction device and the cooling mechanism (6).

2. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 1, characterized in that, The cleaning scraper (51) is an L-shaped folded plate with an arc-shaped junction of its two straight sides; the cleaning scraper (51) has a slag collection groove (52) on the side facing the welding mechanism, and at least one air intake (54) is provided on the top of the slag collection groove (52), and the air intake (54) is connected to the air extraction device through the air intake pipe (10).

3. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 2, characterized in that, A slag storage groove (55) is fixedly provided on the cleaning scraper (51). The slag storage groove (55) is located at the bottom of the vertical side of the cleaning scraper (51) and is arranged towards the side of the pot.

4. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 2, characterized in that, The slag collection tank (52) is provided with several support ribs (53), which divide the slag collection tank (52) into multiple independent tanks. Each independent tank is provided with an air intake (54) at its top.

5. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 1, characterized in that, The triggering mechanism includes: The air extraction trigger (7) is disposed between the mounting base (3) and the cleaning scraper (51). When the cleaning scraper (51) moves upward relative to the mounting base (3), the air extraction trigger (7) activates the starting circuit of the air extraction device. The plasma arc welding torch trigger part (8) is disposed between the mounting base (3) and the cleaning scraper (51). When the cleaning scraper (51) moves upward relative to the mounting base (3), the plasma arc welding torch trigger part (8) turns on the starting circuit of the welding mechanism. A cooling trigger unit (9) is disposed between the mounting base (3) and the cleaning scraper (51). When the cleaning scraper (51) moves upward relative to the mounting base (3), the cooling trigger unit (9) activates the starting circuit of the cooling mechanism (6).

6. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 5, characterized in that, The air extraction trigger unit (7) includes: The upright (71) is fixed to the bottom of the mounting base (3), and has an air passage (72) and a trough (73) inside. The air passage (72) is connected to the suction pipe (10). A ball plug (74) is rotatably disposed in the trough (73), and the ball plug (74) is provided with a ball plug through hole (78) for controlling the opening and closing of the air passage (72); The push rod (77) is fixedly connected to the support shaft (76) of the ball blocker (74); The guide rod (75) is fixed on the cleaning scraper (51), and a push block (79) is provided at its upper end. When the cleaning scraper (51) moves upward relative to the mounting base (3), the push block (79) pushes the push rod (77) to rotate, so that the ball-blocking through hole (78) is connected to the air passage (72). The air extraction trigger switch (11) is connected in series in the starting circuit of the air extraction device and is set on the rotation path of the push rod (77). When the push rod (77) rotates to the predetermined position, the air extraction trigger switch (11) is triggered to conduct.

7. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 5, characterized in that, The plasma arc welding torch trigger part (8) includes: The welding torch control lever (81) is fixed to the bottom of the mounting base (3); The welding torch trigger support block (83) is fixed on the upright (71); The welding torch trigger rod (82) is fixed to the cleaning scraper (51) and slides through the welding torch trigger support block (83); The welding torch trigger spring (84) is sleeved on the outside of the welding torch trigger rod (82), and its two ends abut against the cleaning scraper (51) and the welding torch trigger support block (83) respectively. The welding torch trigger slider (88) is slidably disposed in the welding torch trigger groove (86) at the bottom end of the welding torch control rod (81). The top end of the welding torch trigger slider (88) is fixedly provided with a lower welding torch trigger protrusion (89), and the top end of the welding torch trigger groove (86) is fixedly provided with an upper welding torch trigger protrusion (85). The upper welding torch trigger protrusion (85) and the lower welding torch trigger protrusion (89) are connected in series in the starting circuit of the welding mechanism. A welding torch trigger reset spring (87) is disposed in the welding torch trigger groove (86) to reset the welding torch trigger slider (88); When the cleaning scraper (51) moves upward relative to the mounting base (3), the welding torch trigger rod (82) pushes the welding torch trigger slider (88) upward, so that the welding torch trigger lower protrusion (89) contacts the welding torch trigger upper protrusion (85).

8. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 5, characterized in that, The cooling trigger unit (9) includes: Cooling control rod (91) is fixed to the bottom of the mounting base (3); Cooling trigger block (93) is fixed to the upright (71); The cooling trigger rod (92) is fixed to the cleaning scraper (51) and slides through the cooling trigger support block (93); A cooling trigger spring (94) is sleeved on the outside of the cooling trigger rod (92), with its two ends abutting against the cleaning scraper (51) and the cooling trigger support block (93) respectively. A cooling trigger slider (98) is slidably disposed in the cooling trigger groove (96) at the bottom end of the cooling control rod (91). A cooling trigger lower protrusion (99) is fixedly provided at the top end of the cooling trigger slider (98), and a cooling trigger upper protrusion (95) is fixedly provided at the top end of the cooling trigger groove (96). The cooling trigger upper protrusion (95) and the cooling trigger lower protrusion (99) are connected in series in the starting circuit of the cooling mechanism (6). A cooling trigger reset spring (97) is disposed in the cooling trigger groove (96) to reset the cooling trigger slider (98); When the cleaning scraper (51) moves upward relative to the mounting base (3), the cooling trigger rod (92) pushes the cooling trigger slider (98) upward, so that the cooling trigger lower protrusion (99) contacts the cooling trigger upper protrusion (95).

9. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 1, characterized in that, The cooling mechanism (6) includes: The cooling plate (61) is an L-shaped folded plate with an arc-shaped junction between its two straight sides; Multiple atomizing nozzles (62) are fixedly installed on the side of the cooling plate (61) facing the cookware; Cooling water pipe (63) is connected to each of the atomizing nozzles (62); The cooling connecting rod (64) fixes the cooling plate (61) on the mounting base (3).

10. The plasma arc welding equipment for stainless steel cookware with slag removal function according to claim 9, characterized in that, The plasma arc welding machine body (1) integrates the air extraction device and the sprayer, and the outlet of the sprayer is connected to the cooling water pipe (63) through a hose.

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